Solubilities in the system comprising nitromethane and 2,2'-iminobisethanol have been reported in only two publications. Cherkasova, et al.1 carried out measurements of the mutual solubilities of the components between 288 and 338 K by the synthetic method. Zhuravleva, et al.2 studied the mutual solubilities of (1) and (2) between 291 K and 339 K, also by the synthetic method. Values obtained by the graphical interpolation or extrapolation from the data sheets are presented in the following table. Data are "recommended" if two or more apparently reliable studies are in reasonable (± 5 % relative) agreement. All other data are regarded as tentative only.
The upper critical solution temperature has been reported as 337.7 K (Cherkasova et al.1) and 339.2 K (Zhuravleva et al.2). Thus, the tentative value is: 338.5 ± 0.8 K. The corresponding critical solution composition has been reported as xc1 = 0.770 (Cherkasova et al.1) and xc1 = 0.789 (Zhuravleva et al.2), giving a tentative average xc1 = 0.78 ± 0.01.
The tentative values for the mutual solubility reported in the above table have been approximated by the equation based on scaling law (described in the Introduction material to this volume "Relations of Solubility Data in Binary Systems Containing Nitromethane") and the following parameters have been adjusted:
a1 = 0.67585, a2 = -0.19428, b1 = 0.76881, b2 = -1.23084(mean standard error of estimate was 0.0052).
As an approximation, the tentative values of UCST and xc1 have been used. This relationship is presented in Fig. 39 together with experimental data.1,2